--- title: AdBlue in a Diesel Tank Longforgan? Read This canonical: https://www.petrolinadieselcar.co.uk/adblue-in-diesel/longforgan-perth-and-kinross/ location: Longforgan county: Perth and Kinross latitude: 56.457470 longitude: -3.117660 service: AdBlue in a Diesel Tank updated: 2026-10-18 --- # Longforgan: How Does AdBlue End Up in a Diesel Tank, and How Do You Avoid It? Keep the motor and ignition off then ring 0333 366 0103 first — reading can wait when AdBlue is already in your diesel tank. Usually, when your motor has not turned, it's drained and fully purged where your vehicle is around Longforgan. Not happened yet? Below, the rest of the page covers the reasons it takes place and the how to prevent it for good. ## Two fillers, two tanks: AdBlue in a diesel vehicle Diesel feeds the motor — but many current diesels driven round Longforgan and Knapp carry a second liquid too. AdBlue's own tank keeps it, and from there it goes to your exhaust, where spraying cleans the gas. Each tank has its own filler. Many of motors share a single flap for both, while others put the AdBlue filler to your boot or under the bonnet. At the pump, the diesel side gets filled constantly. The AdBlue side is topped up far less regularly, normally from a bottle, and normally by a person who has to stop and think where it goes. Mistakes happen in the gap between the two. ## Longforgan: how AdBlue in the diesel tank takes place It is hardly ever carelessness. Three things tend to line up. First, the warning. Low AdBlue triggers a warning from your car, and running out means limp mode — so a rushed top-up, maybe before work off Main Street, or outside Longforgan Coaching Inn on the way home that evening. The old car's filler is where the hand reaches — but a hire car, a new car or a company car keeps the fillers somewhere else. That is a second factor: a strange car. Nothing halts the tip once it has started, because a bottle with a spout goes into a diesel filler as readily as an AdBlue one. The bottle fits. Whether it occurs in Balruddery or the middle of Longforgan, it's the same few seconds. ## Which filler is for AdBlue, and which for diesel? Before you tip anything, whether on a drive in Kingoodie or a forecourt around Longforgan, check these. They take a couple of seconds. - Read the cap instead of going by where it sits: AdBlue ones are commonly blue or marked "AdBlue", and diesel ones normally aren't. - Many cars fit AdBlue the smaller neck of the two. - Look inside your fuel flap: plenty of motors carry a label there showing which fuel goes where. - The handbook says which it lives if the filler is not next to the diesel cap: the boot, or under the bonnet. - Check with the person who drove it last — before you leave, not when the light comes on — if you collect a hire or company car from somewhere like the car park at Invergowrie. ## AdBlue top-ups that never reach your diesel tank For the day the warning comes on — wherever it is in Perth and Kinross — a routine to follow. - Stop on level, engine off, with time to spare — not hurried on the side of Station Road. - Say "AdBlue" out loud as you unscrew the cap, after you find the AdBlue filler and read it. Daft, perhaps, but it does the trick. - The two under one flap? Then make sure the lid on your diesel side stays closed before lifting the bottle. - Finish when your tank is topped up or the bottle runs dry; until then, pour slowly through the own spout. - Before you start your car, close the cap and check a second time that the diesel cap never opened off. Spot at stage two or three that it has already gone into the diesel side? Then stop just there. Never carry on to stage five. ## Already put AdBlue in the diesel tank in Longforgan? The short order of things, starting with no starting the engine. On plenty of diesels your ignition alone runs the fuel pump, so don't switch the vehicle on. Topping up with diesel will not thin it: instead, AdBlue drops to the base of your tank, right where fuel is drawn from. Ask the staff to help roll the vehicle clear of the pump if you're at a forecourt — the BP, the Asda or somewhere else. Leave it where it is if you are on your own driveway around Longforgan. Stop as soon as it is safe then switch off, if the engine has already run. On the M90, under 15 miles from Longforgan, that means the next junction. A short hop across Longforgan is a smaller job than a run towards Dundee, under 10 miles away, so tell us about how far it went. ## What occurs when our technicians arrive in Longforgan By the local primary school, near Mercat Cross or on your own driveway: wherever the vehicle has stopped, we come to it. Our technicians ask what got in, about how much, and if it's run, because the answers settle the work and our price. Nobody heads out until you have heard our quote over the phone. Then the tank is drained and the system flushed thoroughly. Unlike petrol, AdBlue forms crystals and eats at certain fuel-system metals, and neither washes out unaided. That is why it matters more. The fuel filter is flushed, or replaced where it needs to be; clean diesel goes in; and the car is tested. The motor is fired up next and checked to confirm it runs correctly, all before our technicians go. Using pumps fine on a working forecourt and quiet enough to use outside a house at night, most jobs in which your motor has not run take roughly half an hour after our technicians are there. You pay on the day, with nothing upfront, and get a VAT invoice and an engineer report for your insurer. While we travel, take a look at your insurance documents; plenty include cover for misfuelling. ## About Longforgan, for a moment Longforgan is a small village in eastern Scotland, situated near the coast and approximately 5.5 miles from Dundee. Longforgan sits at an elevation of 44 metres, with detached housing being the predominant type of accommodation in the area. Longforgan is close to nearby places such as Balruddery, Templehall, and Benvie, and is home to around 730 residents. ## AdBlue drains around Longforgan and across Perth and Kinross Longforgan is a coastal village, and the vans that cover it also work the places near it, Templehall and Benvie among them, across the DD postcode area. A postcode starting DD2 5 gets our van to you fastest. Moving your car isn't necessary. Our technicians drain it where it is — a side street near Longforgan Church Hall, a lay-by on the way to Longforgan Remembrance Garden, a drive. Assuming doesn't help at the back of Longforgan Parish Church, close to a border, or anywhere awkward to describe; ring and check. ## The short version for Longforgan people Always, the cap; after that, the pour. AdBlue in your diesel tank regardless? Keep the car switched off and call 0333 366 0103; Petrol in Diesel empties it on the spot, throughout Perth and Kinross.